KitchenAid Refrigerator Repair in Toronto — Freezer cold but fridge warm

• On the freestanding French-door/counter-depth line (KRFF/KRFC, premium-trim Whirlpool platform), freezer-cold-but-fridge-warm is the textbook single-evaporator airflow fault, and the most common failed part is the evaporator fan motor. These are single-evaporator boxes: one fan, behind the freezer rear cover, pushes freezer-made cold forward into the fresh-food section, so when it seizes or loses a winding the freezer holds while the fridge climbs. The correct part on this French-door line is the Whirlpool W11024089 (PartSelect PS11773024 / AP6039916, replacing W10199049/W10904013, a 115V ~3100 RPM motor that fits the KRFF305 series) — NOT the legacy W10189703/WPW10189703 fan from the older top-mount/side-by-side line. We spin the blade by hand and ring out the windings before condemning it, because a frost-jammed fan and a dead motor present identically until you clear the ice and test continuity.
• When the freezer is fine and only the fresh-food side is warm with the evaporator fan running, the air damper is the next suspect, not the sealed system: the motorized damper meters freezer air into the fridge, and when it sticks CLOSED the fresh-food box starves while the freezer stays cold. The genuine part on this platform is the air damper control assembly WPW10594329 (PartSelect PS11756641 / AppliancePartsPros AP6023299), and Whirlpool/KitchenAid literature and field reports document it failing stuck-closed exactly as 'fridge warm, freezer fine.' We confirm it in diagnostics rather than guessing — KitchenAid service test 3 cycles the evaporator fans AND the air-baffle (damper) motor, so we drive the baffle and watch it open before ordering the WPW10594329, so a stuck flap is not mistaken for a fan or a refrigerant fault.
• A drifting thermistor feeds the board bad temperature data and is the quiet freezer-cold/fridge-warm cause on electronic models: KitchenAid surfaces a bad sensor as E1 (open thermistor) or E2 (shorted thermistor), and diagnostic service test 1 reports the FREEZER thermistor as a result code (01 = pass, 02 = open, 03 = shorted) with test 2 doing the same for the FRESH-FOOD sensor. A fresh-food thermistor that reads falsely cold tells the board the fridge is satisfied, so the board stops calling cold to that compartment while the freezer keeps cycling — a textbook 'fridge warm, freezer cold' with every mechanical part healthy. We read the test-1/test-2 codes off the temperature display and ohm the suspect NTC sensor (~5,000–25,000 ohms across its cold range) against spec before touching the board.
• When the WHOLE evaporator ices over, the fridge warms first because the fresh-food air path is the longest run: the defrost circuit is the root cause and it is two parts that fail the same way. The bimetal defrost thermostat WPW10225581 clips to the coil and must CLOSE cold so the defrost heater assembly WPW10436849 (PartSelect PS11754723, the genuine Whirlpool element for the KRFF300E series) can fire and melt each cycle's frost. If the bimetal opens or the heater burns out, auto-defrost never completes, the coil sheets over, airflow chokes, and the fridge drifts warm while the freezer holds longest. KitchenAid's own service mode separates them: test 6 reads the bimetal status (01 = closed, 02 = open) and test 38 forces a defrost so we watch the heater actually energize — we continuity-test thermostat and heater separately before condemning either.
• Frost that builds over DAYS with a good thermostat and a good heater and no clear failure points at the control board mistiming the adaptive defrost cycle, not at a defrost-circuit part: the main control runs the adaptive defrost timer (service test 7 reports ADC mode — 01 = adaptive on, 02 = basic 8-hour schedule), so a board that skips or stretches defrost intervals lets the coil ice up and the fridge warm with NO display code. RepairClinic flags the temperature control board as commonly MISdiagnosed on this exact 'freezer cold, fridge warm' complaint — it can also send continuous or wrong voltage to the compressor/fans — so we prove the fan, damper, thermistor, heater and thermostat good FIRST (tests 1, 2, 3, 6, 38) and never lead with the most expensive part on a warm-fridge KitchenAid.
• On the 42–48" built-in line (KSSC/KBSD/KBFN/KBFA), a warm fresh-food side or an erratically-warming box is its own diagnosis: the mid-2000s main control / ACU board (W10219463 generation) is notorious for failing the evaporator-fan, condenser-fan and defrost outputs, and because the original board became scarce it is now commonly handled through board-repair/exchange services (FixYourBoard, Circuit Board Medics). A board failing those outputs reads as 'freezer survives, fridge warms' and mimics a sealed-system verdict, so we price the board path BEFORE condemning the compressor or refrigerant on any built-in — and JennAir built-ins of the same era share this architecture and the identical W10219463 board story.
• On a box that is dead-cold and warming in BOTH compartments (the fridge noticed first because it runs warmer by design), the compressor start device is the part, not airflow: the start relay and capacitor W10613606 (replaces W10416065 / PS8746522) serves the compressors across the freestanding KRMF/KRFF line and the KBFA/KBFS built-ins. A rattle when shaken or an open between the relay terminals confirms it; a compressor that buzzes then trips and restarts every few minutes is the overload cycling. We confirm the relay before ever condemning the compressor, because a cheap start-device failure looks exactly like a dead compressor and a slowly-warming fridge.

KitchenAid freezer cold but fridge warm in Toronto — the local specifics

• The recurring KitchenAid-in-Toronto pattern for freezer-cold/fridge-warm is the single-evaporator airflow split: on the freestanding KRFF/KRFC line it lands overwhelmingly on the evaporator fan motor (frost-jammed or winding-failed) or the stuck-closed air damper, with the defrost circuit behind it when the whole coil has sheeted over. We routinely see warm-fridge calls that are actually a sensor or board mistiming the box — so we run the diagnostic service tests (1/2 thermistors, 3 fans + baffle, 6/38 defrost) before quoting, because the temperature control board is the most-misdiagnosed part on this exact complaint.
• We bring the freestanding-line freezer-cold/fridge-warm kit to these Toronto calls: the W11024089 evaporator fan motor, the WPW10594329 air damper control assembly, the WPW10225581 bimetal defrost thermostat, a WPW10436849 defrost heater, and a W10613606 start relay/cap — all genuine Whirlpool-channel — plus a steamer to fully thaw an iced coil/drain before fitting any defrost part. On a 42–48" built-in we confirm the W10219463 board path first, since that board is exchange-only and not a van-stock item.

For the full KitchenAid refrigerator module — every fault, part number and code — see KitchenAid refrigerator repair in Toronto, and for the same fault across all brands the refrigerator freezer cold but fridge warm guide.